板状WC晶粒WC-(Co-Ni)硬质合金的组织和性能<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.020.016

Abstract
Figure/Table
References
Related Citation (15)

Download:

Full Text ( PDF ) (1635KB)
Export: BibTeX | EndNote (RIS)

Abstract WC-(Co-Ni) cemented carbides with plate-like WC grains were produced by vacuum sintering. The effects of Ni/(Ni+Co) ratio on the microstructure and mechanical properties of WC-(Co-Ni) cemented carbides were studied by X-ray diffracto-metry (XRD), scanning electron microscopy (SEM) and energy dispersive spectrdmeter (EDS). The results showed that with the increasing Ni/(Ni+Co) ratio, the ratio of plate-like WC grains in the microstructure of cemented carbides decreased, the sizes of hard phase particles gradually increased, and the average length-thickness ratio of hard phase particles gradually decreased. When the Ni/(Ni+Co) ratio was too high, the hard phase particles in cemented carbides were merged together, resulting in an obvious decrease of its mechanical properties. As the Ni/(Ni+Co) ratio was 0.3 or 0.5, WC-(Co-Ni) cemented carbides exhibited good mechanical properties, which was related to the smaller hard phase particles and bigger average length-thickness ratio of hard phase particles. WC-(Co-Ni) cemented carbides with Ni/(Ni+Co) ratio of 0.5 exhibited better mechanical properties, the TRS, hardness and K_IC were 2 448 MPa, 90.0HRA, 21.2 MPa·m^1/2, respectively.

Key words： plate-like WC grains cemented carbide microstructure mechanical properties

Published: 05 May 2018

CLC number:

TB33

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	LU Xuepeng
	TU Yankun
	ZHENG Yong
	DONG Zuowei

Cite this article:

LU Xuepeng,TU Yankun,ZHENG Yong, et al. Microstructure and Properties of WC-(Co-Ni) Cemented Carbides with Plate-like WC Grains[J]. Materials Reports, 2017, 31(20): 73-76.

URL:

http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.020.016 OR http://www.mater-rep.com/EN/Y2017/V31/I20/73

1 Mukhopadhyay A, Basu B. Recent developments on WC-based bulk composites[J]. J Mater Sci, 2011,46(3):571.
2 Zhang Weibing, Liu Xiangzhong, Chen Zhenhua, et al. Latest development of WC-Co cemented carbide[J]. Chin J Rare Metals, 2015,39(2):178(in Chinese).
张卫兵, 刘向中, 陈振华, 等. WC-Co硬质合金最新进展[J]. 稀有金属, 2015,39(2):178.
3 Xie Haigen, Yi Danqing, Huang Daoyuan, et al. Preparation of ultra-fine grained hard metals[J]. Rare Metals Cemented Carbides, 2007,35(4):14(in Chinese).
谢海根, 易丹青, 黄道远, 等. 超细晶硬质合金的制备[J]. 稀有金属与硬质合金, 2007,35(4):14.
4 Lei Chunpeng, Tang Jiancheng, Liu Gang, et al. Effects of morphology structures of tungsten powders on the properties and microstructures of plate-like grain cemented carbides[J]. Rare Metal Ma-ter Eng, 2016,45(8):2146(in Chinese).
雷纯鹏, 唐建成, 刘刚, 等. W粉末的形貌结构对板状晶硬质合金的组织与性能的影响[J]. 稀有金属材料与工程, 2016,45(8):2146.
5 Zhong Jie, Zheng Yong, Yan Yonglin, et al. Research progress of fabrication technology of functionally gradient hard metals and cermets[J]. Mater Mech Eng, 2009,33(2):1(in Chinese).
钟杰, 郑勇, 严永林, 等. 功能梯度硬质合金与金属陶瓷制备技术的研究进展[J]. 机械工程材料, 2009,33(2):1.
6 Zhu Lihui, Liu Kun, Li Zhilin. Study on the hardening and toughening mechanisms of WC-Co cemented carbides with plate-like WC grains[J]. Rare Metal Mater Eng, 2011,40(s2):443(in Chinese).
朱丽慧, 刘坤, 李志林. 含板状 WC 晶粒硬质合金的强韧化机制研究[J]. 稀有金属材料与工程, 2011,40(s2):443.
7 Kinoshita S, Kobayashi M, Hayashi K. High temperature strength of WC-Co base cemented carbide having highly oriented plate-like triangular prismatic WC grains[J]. J Jpn Soc Powder Powder Me-tall, 2002,49(4):299.
8 Kinoshita S, Saito T, Kobayashi M, et al. Mechanisms for formation of highly oriented plate-like triangular prismatic WC grains in WC-Co base cemented carbides prepared from W and C Instead of WC[J]. J Jpn Soc Powder Powder Metall, 2001,48(1):51.
9 Tu Yankun, Zheng Yong, Zhao Yijie, et al. Influences of heating rate during solid state sintering on microstructure and mechanical properties of WC-Co cemented carbide with plate-like WC grains[J]. Cemented Carbide, 2015,32(4):221(in Chinese).9 涂彦坤, 郑勇, 赵毅杰, 等. 固相烧结阶段的升温速率对板状WC晶粒硬质合金的显微组织和力学性能的影响[J]. 硬质合金, 2015,32(4):221.
10Long Jianzhan, Lu Bizhi, Yi Maozhong, et al. Research progress on cemented carbide with novel binders[J]. Cemented Carbide, 2015,32(3):204(in Chinese).
龙坚战, 陆必志, 易茂中, 等. 新型粘结相硬质合金的研究进展[J]. 硬质合金, 2015,32(3):204.
11Su W, Sun Y X, Liu J, et al. Effects of Ni on the microstructures and properties of WC-6Co cemented carbides fabricated by WC-6(Co, Ni) composite powders[J]. Ceram Int, 2015,41:3169.
12Phuong D D, Trinh P V, Duong L V, et al. Influence of sintering temperature on microstructure and mechanical properties of WC-8Ni cemented carbide produced by vacuum sintering[J]. Ceram Int, 2016,42:14937.
13Niihara K. A fracture mechanics analysis of indentation-induced Palmqvist crack in ceramics[J]. J Mater Sci Lett, 1983,2:221.
14Luyckx S, Love A. The dependence of the contiguity of WC on Co content and its independence from WC grain size in WC-Co alloys[J]. Int J Refract Met Hard Mater, 2006,24(1):75.
15Kong Dehui, He Baoshan, Liu Linhai. Effect of chromium content on structure and properties of WC-based cemented carbide[J]. Shanghai Nonferrous Met, 2005,26(2):53(in Chinese).
孔德会, 何宝山, 刘林海. Cr 含量对 WC 基硬质合金组织和性能的影响[J]. 上海有色金属, 2005,26(2):53.
16Sohi M H, Khameneh A S, Hokamoto K, et al. A DTA study on HVOF thermally sprayed WC-M coatings[J]. Mater Sci Forum, 2008,566:155.